Turn signal fun

Excellent suggestion.
Check the hazzards.
Check the brake lights.

There's an explanation of the turn signal, stop and hazzard circuits here:
1967 Chrysler Imperial Electrical Accessory Circuit From the Master Technicians Service Conference Session 236

A little explanation about the schematic they use.
The portions I've colored represent the moving brass contacts in the turn signal switch. All three move together when the signal lever is moved.
The black circles are connected to the wires and do not move.
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Parking light connections are shown because they share grounding connections with the circuit you're troubleshooting.